SCOPE OF ACCREDITATION TO ISO/IEC 17025:2017

& ANSI/NCSL Z540-1-1994

CONSUMERS ENERGY/LABORATORY SERVICES

Laboratory Services
135 West Trail Street
Jackson, MI 49201
Merideth L. Armstrong Phone: 517 788 2218
Merideth.Armstrong@cmsenergy.com

CALIBRATION

Valid To: July 31, 2022 Certificate Number: 1097.01

In recognition of the successful completion of the A2LA evaluation process, accreditation is granted to
this laboratory to perform the following calibrations1, 10:

I. Dimensional

Parameter/Equipment Range CMC2, 4 () Comments

Steel Rules and Scales Up to 60 in 0.0015 in Renishaw ML10 laser

measuring system

Step Blocks Up to 9 in (30 + 3.9L) in Gage blocks and gage

head amplifier

Torque Arms 5 in 0.0010 in End rods, gage blocks,

10 in 0.0011 in dial indicator,
24 in 0.0017 in micrometer
60 in 0.0051 in

Calipers and Up to 36 in (9.0 + 6.0L) µin + 0.6R Gage blocks

Micrometers3

Height Gages3 Up to 36 in (86 + 1.3L) µin + 0.6R Gage blocks

Length Standards Up to 6 in (6.4 + 4.3L) µin P&W LabmasterTM and

(6 to 39) in (-22 + 8.9L) µin gage blocks

(A2LA Cert. No. 1097.01) Revised 6/4/2021 Page 1 of 20

II. Electrical – DC/Low Frequency

Parameter/Equipment Range CMC2, 5, 6, 8, 12 () Comments

DC Voltage – Generate3 Up to 220 mV 6.0 µV/V + 0.46 µV Fluke 5720A

220 mV to 2.2 V 3.5 µV/V + 0.74 µV
(2.2 to 11) V 2.5 µV/V + 2.5 µV
(11 to 22) V 2.5 µV/V + 4.0 µV
(22 to 220) V 3.5 µV/V + 40 µV
(220 to 1100) V 4.5 µV/V + 400 µV

Fixed Point 10 V 0.40 µV/V Fluke 732B

DC Voltage – Measure3 Up to 100 mV 10 µV/V + 0.49 µV HP 3458A

100 mV to 1 V 9.2 µV/V + 0.49 µV
(1 to 10) V 9.2 µV/V + 5.8 µV
(10 to 100) V 12 µV/V + 35 µV
(100 to 500) V 15 µV/V + 0.12 mV
(500 to 1000) V 25 µV/V + 0.12 mV

DC High Voltage – (1 to 10) kV 0.084 % Agilent 34401A and

Measure3 (10 to 100) kV 0.072 % divider

DC Current – Generate3 Up to 220 μA 35 μA/A + 6.0 nA Fluke 5720A

220 μA to 2.2 mA 30 μA/A + 7.0 nA
(2.2 to 22) mA 30 μA/A + 40 nA
(22 to 100) mA 40 μA/A + 0.70 μA
(100 to 220) mA 50 μA/A + 0.70 μA
220 mA to 1 A 60 μA/A + 12 μA
(1 to 2.2) A 0.011 % + 12 μA
(2.2 to 11) A 0.034 % + 0.48 mA Fluke 5720A, Fluke
5725A
(11 to 20.5) A 0.078 % + 0.58 mA Fluke 5520A

(11 to 16.5) Amp Turns 0.20 % + 2.5 mA Fluke 5520A and

(16.5 to 150) Amp Turns 0.20 % + 12 mA Fluke 50 turn coil
(150 to 1000) Amp Turns 0.22 % + 39 mA

(A2LA Cert. No. 1097.01) Revised 6/4/2021 Page 2 of 20

 Parameter/Equipment Range CMC2, 6, 8, 12 () Comments

DC Current – Measure3 (10 to 100) A 23 A/A + 0.93 nA HP 3458A

100 A to 1 mA 23 A/A + 6.0 nA
(1 to 10) mA 23 A/A + 58 nA
(10 to 100) mA 40 A/A + 0.58 µA
100 mA to 1 A 0.013 % + 0.12 mA

DC Resistance – (0 to 10) Ω 17 µΩ/Ω + 58 µΩ HP 3458A

Measure3 (10 to 100) Ω 14 µΩ/Ω + 0.58 mΩ
100 Ω to 1 kΩ 12 µΩ/Ω + 0.58 mΩ
(1 to 10) kΩ 12 µΩ/Ω + 5.8 mΩ
(10 to 100) kΩ 12 µΩ/Ω + 58 mΩ
100 kΩ to 1 MΩ 17 µΩ/Ω + 2.3 Ω
(1 to 10) MΩ 58 µΩ/Ω + 0.12 kΩ
(10 to 100) MΩ 0.058 % + 1.2 kΩ
100 MΩ to 1 GΩ 0.58 % + 12 kΩ

DC Resistance – (0.000 025 to 0.001)  0.0025 % + 0.071 µΩ MI 6011 range

Measure extender/standard
resistor and Agilent
34420A
(0.001 to 0.01)  3.6 parts in 106 
(0.01 to 0.1)  3.7 parts in 106  MI 6010
(0.1 to 1)  1.3 parts in 106  bridge/MI6011 range
extender and standard
1  to 10 k 1.4 parts in 106  resistors

MI6010 bridge and

(10 to 100) k 1.1 parts in 106  standard resistors
100 k to 1 M 1.2 parts in 106 
(1 to 10) M 1.6 parts in 106  MI6000A high
(10 to 100) M 2.8 parts in 106  resistance bridge and
100 M to 1 G 3.7 parts in 106  standard resistors

90 k to 20 M 0.029 % Guildline 6520

(20 to 200) M 0.017 % teraohmmeter
200 M to 2 G 0.023 %
(2 to 20) G 0.069 %
(20 to 200) G 0.092 %
200 G to 2 T 0.14 %
(2 to 20) T 0.40 %
(20 to 200) T 0.69 %

(A2LA Cert. No. 1097.01) Revised 6/4/2021 Page 3 of 20

 Parameter/Equipment Range CMC2, 5, 8, 12 () Comments

DC Resistance – 0Ω 40 µΩ Fluke 5720A

Generate3, Fixed Points 1Ω 82 µΩ/Ω
1.9 Ω 80 µΩ/Ω
10 Ω 21 µΩ/Ω
19 Ω 21 µΩ/Ω
100 Ω 9.0 µΩ/Ω
190 Ω 9.0 µΩ/Ω
1 kΩ 7.5 µΩ/Ω
1.9 kΩ 7.6 µΩ/Ω
10 kΩ 7.5 µΩ/Ω
19 kΩ 7.5 µΩ/Ω
100 kΩ 9.0 µΩ/Ω
190 kΩ 9.0 µΩ/Ω
1 MΩ 15 µΩ/Ω
1.9 MΩ 16 µΩ/Ω
10 MΩ 31 µΩ/Ω
19 MΩ 40 µΩ/Ω

100 MΩ 31 µΩ/Ω Measurements

1 GΩ 30 µΩ/Ω International 9331G
10 GΩ 0.059 % resistors
100 GΩ 0.064 %
1 TΩ 0.062 %
10 TΩ 0.060 %
100 TΩ 2.3 %

Capacitance – Generate (0.19 to 0.4) nF 0.39 % + 0.0078 nF Fluke 5520A

(0.4 to 1.1) nF 0.40 % + 0.0078 nF
(1.1 to 3.3) nF 0.39 % + 0.0078 nF
(3.3 to 11) nF 0.22 % + 0.0078 nF
(11 to 33) nF 0.20 % + 0.078 nF
(33 to 110) nF 0.22 % + 0.078 nF
(110 to 330) nF 0.22 % + 0.23 nF
330 nF to 1.1 µF 0.22 % + 0.000 78 µF
(1.1 to 3.3) µF 0.22 % + 0.0023 µF
(3.3 to 11) µF 0.22 % + 0.0078 µF
(11 to 33) µF 0.33 % + 0.023 µF
(33 to 110) µF 0.36 % + 0.078 µF
(110 to 330) µF 0.36 % + 0.24 µF
330 µF to 1.1 mF 0.36 % + 0.000 78 mF
(1.1 to 3.3) mF 0.36 % + 0.0023 mF
(3.3 to 11) mF 0.36 % + 0.0078 mF
(11 to 33) mF 0.59 % + 0.023 mF
(33 to 110) mF 0.86 % + 0.078 mF

Fixed Point 1000 pF 0.0025 % GenRad 1404-A

(A2LA Cert. No. 1097.01) Revised 6/4/2021 Page 4 of 20

 Parameter/Equipment Range CMC2, 5, 8, 12 () Comments

Capacitance – Measure 10 aF to 11.11 µF 0.012 % + 0.000 40 pF Gen Rad 1620

capacitance
measuring bridge
with 1615-P1
range extension
capacitor

Oscilloscopes –

Amplitude DC

DC Signal
50 Ω load (0 to ± 6.6) V 0.21 % + 31 µV Fluke 5520A with
1 MΩ load (0 to ± 130) V 0.046 % + 31 µV SC1100 scope
option
Amplitude – Square
Wave (pk - pk)

50 Ω Load ±1 mV to ± 6.6 V 0.20 % + 31 µV

1 MΩ Load ±1 mV to ± 130 V 0.081 % + 31 µV (≤ 1 kHz)

0.20 % + 31 µV (> 1 kHz)

Leveled Sine Wave 50 kHz Reference 1.6 % + 300 µV Fluke 5520A with
(Into 50 Ω Load) 50 kHz to 100 MHz 2.7 % + 300 µV SC1100 scope
(100 to 300) MHz 3.1 % + 300 µV option
(300 to 600) MHz 4.7 % + 300 µV
(600 to 1100) MHz 5.4 % + 300 mV

Flatness @ 50 kHz 50 kHz to 100 MHz 1.2 % + 100 µV

Reference (100 to 300) MHz 1.6 % + 100 µV
(300 to 600) MHz 3.1 % + 100 µV
(600 to 1100) MHz 3.9 % + 100 µV

Time Marker (Into 50 Ω) 5 s to 50 ms (22 + 1000t) µs/s t is the numerical

20 ms to 1 ns 1.9 µs/s value of the time in
seconds

Edge Spec (Rise Time) ≤ 300 ps (+0 ps / -78 ps)

(A2LA Cert. No. 1097.01) Revised 6/4/2021 Page 5 of 20

 Parameter/Range Frequency CMC2, 5 () Comments

AC Voltage – Generate3

Up to 22 mV (10 to 20) Hz 0.022 % + 4.0 µV Fluke 5720A

(20 to 40) Hz 87 µV/V + 4.0 µV
40 Hz to 20 kHz 78 µV/V + 4.0 µV
(20 to 50) kHz 0.018 % + 4.0 µV
(50 to 100) kHz 0.046 % + 5.0 µV
(100 to 300) kHz 0.090 % + 10 µV
(300 to 500) kHz 0.12 % + 20 µV
500 kHz to 1 MHz 0.25 % + 20 µV

(22 to 220) mV (10 to 20) Hz 0.023 % + 12 µV

(20 to 40) Hz 92 µV/V + 7.0 µV
40 Hz to 20 kHz 76 µV/V + 7.0 µV
(20 to 50) kHz 0.018 % + 7.0 µV
(50 to 100) kHz 0.042 % + 17 µV
(100 to 300) kHz 0.075 % + 20 µV
(300 to 500) kHz 0.12 % + 25 µV
500 kHz to 1 MHz 0.25 % + 45 µV

220 mV to 2.2 V (10 to 20) Hz 0.022 % + 40 µV

(20 to 40) Hz 81 µV/V + 15 µV
40 Hz to 20 kHz 41 µV/V + 8.0 µV
(20 to 50) kHz 70 µV/V + 10 µV
(50 to 100) kHz 0.011 % + 30 µV
(100 to 300) kHz 0.034 % + 80 µV
(300 to 500) kHz 0.090 % + 0.20 mV
500 kHz to 1 MHz 0.15 % + 0.30 mV

(2.2 to 22) V (10 to 20) Hz 0.022 % + 0.40 mV

(20 to 40) Hz 80 µV/V + 0.15 mV
40 Hz to 20 kHz 40 µV/V + 50 µV
(20 to 50) kHz 70 µV/V + 100 µV
(50 to 100) kHz 96 µV/V + 200 µV
(100 to 300) kHz 0.026 % + 0.60 mV
(300 to 500) kHz 0.090 % + 2.0 mV
500 kHz to 1 MHz 0.13 % + 3.2 mV

(22 to 220) V (10 to 20) Hz 0.022 % + 4.0 mV Maximum output

(20 to 40) Hz 80 µV/V + 1.5 mV Capability of
40 Hz to 20 kHz 47 µV/V + 0.60 mV 2.2x107 V-Hz
(20 to 50) kHz 75 µV/V + 1.0 mV
(50 to 100) kHz 0.013 % + 2.5 mV
(100 to 300) kHz 0.080 % + 16 mV
(300 to 500) kHz 0.42 % + 40 mV
500 kHz to 1 MHz 0.72 % + 80 mV

(A2LA Cert. No. 1097.01) Revised 6/4/2021 Page 6 of 20

 Parameter/Range Frequency CMC2, 5, 6, 12 () Comments

AC Voltage – Generate3
(cont)

(220 to 250) V (15 to 50) Hz 0.026 % + 16 mV Fluke 5720A

(220 to 1100) V 50 Hz 80 µV/V + 4.0 mV

50 Hz to 1 kHz 63 µV/V + 3.5 mV

(220 to 750) V (30 to 50) kHz 0.036 % + 11 mV Fluke 5720A

(50 to 100) kHz 0.13 % + 45 mV Fluke 5725A

(220 to 1100) V (1 to 20) kHz 0.013 % + 6.0 mV

(20 to 30) kHz 0.036 % + 11 mV

AC Voltage – Measure3
(1 to 10) mV (1 to 40) Hz 0.035 % + 3.5 µV HP 3458A

(10 to 100) mV (1 to 40) Hz 88 µV/V + 4.6 µV

100 mV to 1 V (1 to 40) Hz 81 µV/V + 46 µV

(1 to 10) V (1 to 40) Hz 81 µV/V + 0.46 mV

(10 to 100) V (1 to 40) Hz 0.023 % + 4.6 mV

(100 to 700) V (1 to 40) Hz 0.046 % + 46 mV

Up to 2.2 mV (10 to 20) Hz 0.17 % + 1.3 µV Fluke 5790A

(20 to 40) Hz 0.074 % + 1.3 µV frequencies ≥ 1 MHz
40 Hz to 20 kHz 0.042 % + 1.3 µV are referenced to 1 kHz
(20 to 50) kHz 0.081 % + 2.0 µV
(50 to 100) kHz 0.12 % + 2.5 µV
(100 to 300) kHz 0.23 % + 4.0 µV
(300 to 500) kHz 0.26 % + 8.0 µV
(0.5 to 1) MHz 0.50 % + 8.0 µV
(1 to 2) MHz 0.11 % + 1.5 µV
(2 to 10) MHz 0.26 % + 1.5 µV
(10 to 20) MHz 0.45 % + 1.5 µV
(20 to 30) MHz 1.1 % + 3.0 µV

(A2LA Cert. No. 1097.01) Revised 6/4/2021 Page 7 of 20

 Parameter/Range Frequency CMC2, 5, 8, 12 () Comments

AC Voltage – Measure3
(cont)

(2.2 to 7) mV (10 to 20) Hz 0.085 % + 1.3 µV Fluke 5790A

(20 to 40) Hz 0.037 % + 1.3 µV frequencies ≥ 1 MHz
40 Hz to 20 kHz 0.021 % + 1.3 µV are referenced to 1 kHz
(20 to 50) kHz 0.041 % + 2.0 µV
(50 to 100) kHz 0.061 % + 2.5 µV
(100 to 300) kHz 0.12 % + 4.0 µV
(300 to 500) kHz 0.14 % + 8.0 µV
(0.5 to 1) MHz 0.36 % + 8.0 µV
(1 to 2) MHz 0.11 % + 1.5 µV
(2 to 10) MHz 0.15 % + 1.5 µV
(10 to 20) MHz 0.26 % + 1.5 µV
(20 to 30) MHz 0.56 % + 1.5 µV
(7 to 22) mV (10 to 20) Hz 0.029 % + 1.3 µV
(20 to 40) Hz 0.019 % + 1.3 µV
40 Hz to 20 kHz 0.011 % + 1.3 µV
(20 to 50) kHz 0.021 % + 2.0 µV
(50 to 100) kHz 0.031 % + 2.5 µV
(100 to 300) kHz 0.082 % + 4.0 µV
(300 to 500) kHz 0.10 % + 8.0 µV
(0.5 to 1) MHz 0.26 % + 8.0 µV
(1 to 2) MHz 0.11 % + 1.5 µV
(2 to 10) MHz 0.15 % + 1.5 µV
(10 to 20) MHz 0.26 % + 1.5 µV
(20 to 30) MHz 0.56 % + 1.5 µV

(22 to 70) mV (10 to 20) Hz 0.024 % + 1.5 µV

(20 to 40) Hz 0.012 % + 1.5 µV
40 Hz to 20 kHz 0.0069 % + 2.5 µV
(20 to 50) kHz 0.013 % + 2.0 µV
(50 to 100) kHz 0.026 % + 2.5 µV
(100 to 300) kHz 0.053 % + 4.0 µV
(300 to 500) kHz 0.068 % + 8.0 µV
(0.5 to 1) MHz 0.13 % + 8.0 µV
(1 to 2) MHz 0.075 %
(2 to 10) MHz 0.15 %
(10 to 20) MHz 0.23 %
(20 to 30) MHz 0.53 %

(A2LA Cert. No. 1097.01) Revised 6/4/2021 Page 8 of 20

 Parameter/Range Frequency CMC2, 5, 8, 12 () Comments

AC Voltage – Measure3
(cont)

(70 to 220) mV (10 to 20) Hz 0.021 % + 1.5 µV Fluke 5790A

(20 to 40) Hz 0.0087 % + 1.5 µV frequencies ≥ 1 MHz
40 Hz to 20 kHz 0.0043 % + 1.5 µV are referenced to 1 kHz
(20 to 50) kHz 0.0073 % + 2.0 µV
(50 to 100) kHz 0.016 % + 2.5 µV
(100 to 300) kHz 0.028 % + 4.0 µV
(300 to 500) kHz 0.040 % + 8.0 µV
(0.5 to 1) MHz 0.12 % + 8.0 µV
(1 to 2) MHz 0.075 %
(2 to 10) MHz 0.15 %
(10 to 20) MHz 0.23 %
(20 to 30) MHz 0.53 %
(220 to 700) mV (10 to 20) Hz 0.021 % + 1.5 µV
(20 to 40) Hz 0.0078 % + 1.5 µV
40 Hz to 20 kHz 0.0038 % + 1.5 µV
(20 to 50) kHz 0.0056 % + 2.0 µV
(50 to 100) kHz 0.0084 % + 2.5 µV
(100 to 300) kHz 0.021 % + 4.0 µV
(300 to 500) kHz 0.034 % + 8.0 µV
(0.5 to 1) MHz 0.12 % + 8.0 µV
(1 to 2) MHz 0.075 %
(2 to 10) MHz 0.15 %
(10 to 20) MHz 0.23 %
(20 to 30) MHz 0.53 %

700 mV to 2.2 V (10 to 20) Hz 0.020 %

(20 to 40) Hz 0.0069 %
40 Hz to 20 kHz 0.0029 %
(20 to 50) kHz 0.0052 %
(50 to 100) kHz 0.0076 %
(100 to 300) kHz 0.020 %
(300 to 500) kHz 0.031 %
(0.5 to 1) MHz 0.12 %
(1 to 2) MHz 0.075 %
(2 to 10) MHz 0.15 %
(10 to 20) MHz 0.23 %
(20 to 30) MHz 0.53 %

(A2LA Cert. No. 1097.01) Revised 6/4/2021 Page 9 of 20

 Parameter/Range Frequency CMC2, 5, 8, 12 () Comments

AC Voltage – Measure3
(cont)

(2.2 to 7) V (10 to 20) Hz 0.020 % Fluke 5790A

(20 to 40) Hz 0.0070 % frequencies ≥ 1 MHz
40 Hz to 20 kHz 0.0029 % are referenced to 1 kHz
(20 to 50) kHz 0.0053 %
(50 to 100) kHz 0.0088 %
(100 to 300) kHz 0.022 %
(300 to 500) kHz 0.047 %
(0.5 to 1) MHz 0.15 %
(1 to 2) MHz 0.075 %
(2 to 10) MHz 0.15 %
(10 to 20) MHz 0.23 %
(20 to 30) MHz 0.53 %
(7 to 22) V (10 to 20) Hz 0.020 %
(20 to 40) Hz 0.0070 %
40 Hz to 20 kHz 0.0031 %
(20 to 50) kHz 0.0053 %
(50 to 100) kHz 0.0085 %
(100 to 300) kHz 0.022 %
(300 to 500) kHz 0.047 %
(0.5 to 1) MHz 0.15 %
(22 to 70) V (10 to 20) Hz 0.020 %
(20 to 40) Hz 0.0072 %
40 Hz to 20 kHz 0.0039 %
(20 to 50) kHz 0.0063 %
(50 to 100) kHz 0.011 %
(100 to 300) kHz 0.022 %
(300 to 500) kHz 0.051 %
(0.5 to 1) MHz 0.15 %
(70 to 220) V (10 to 20) Hz 0.020 %
(20 to 40) Hz 0.0072 %
40 Hz to 20 kHz 0.0038 %
(20 to 50) kHz 0.0077 %
(50 to 100) kHz 0.011 %
(100 to 300) kHz 0.026 %
(300 to 500) kHz 0.070 %

(220 to 700) V (10 to 20) Hz 0.020 %

(20 to 40) Hz 0.011 %
40 Hz to 20 kHz 0.0047 %
(20 to 50) kHz 0.015 %
(50 to 100) kHz 0.085 %

(700 to 1000) V (10 to 20) Hz 0.020 %

(20 to 40) Hz 0.011 %
40 Hz to 20 kHz 0.0040 %
(20 to 50) kHz 0.015 %
(50 to 100) kHz 0.085 %

(A2LA Cert. No. 1097.01) Revised 6/4/2021 Page 10 of 20

 Parameter/Range Frequency CMC2, 5, 8, 12 () Comments

AC Voltage – Measure

(1 to 10) kV 60 Hz 0.57 % Agilent 34401A and

(10 to 50) kV 60 Hz 0.46 % HV divider

AC Current – Generate3

Up to 220 A (10 to 20) Hz 0.023 % + 16 nA Fluke 5720A

(20 to 40) Hz 0.014 % + 10 nA
40 Hz to 1 kHz 0.011 % + 8.0 nA
(1 to 5) kHz 0.025 % + 12 nA
(5 to 10) kHz 0.090 % + 65 nA

220 A to 2.2 mA (10 to 20) Hz 0.023 % + 40 nA

(20 to 40) Hz 0.014 % + 35 nA
40 Hz to 1 kHz 0.011 % + 35 nA
(1 to 5) kHz 0.025 % + 110 nA
(5 to 10) kHz 0.090 % + 65 nA

(2.2 to 22) mA (10 to 20) Hz 0.023 % + 0.40 µA

(20 to 40) Hz 0.014 % + 0.35 µA
40 Hz to 1 kHz 0.011 % + 0.35 µA
(1 to 5) kHz 0.018 % + 0.55 µA
(5 to 10) kHz 0.090 % + 5.0 µA

(22 to 220) mA (10 to 20) Hz 0.023 % + 4.0 µA

(20 to 40) Hz 0.014 % + 3.5 µA
40 Hz to 1 kHz 0.011 % + 2.5 µA
(1 to 5) kHz 0.018 % + 3.5 µA
(5 to 10) kHz 0.090 % + 10 µA

220 mA to 2.2 A 20 Hz to 1 kHz 0.024 % + 35 µA

(1 to 5) kHz 0.039 % + 80 µA
(5 to 10) kHz 0.60 % + 160 µA
(2.2 to 11) A 40 Hz to 1 kHz 0.040 % + 0.17 mA Fluke 5720A,
(1 to 5) kHz 0.085 % + 0.39 mA Fluke 5725A
(5 to 10) kHz 0.33 % + 0.75 mA

(11 to 20.5) A (45 to 100) Hz 0.093 % + 1.6 mA Fluke 5522A

(0.1 to 1) kHz 0.12 % + 3.9 mA
(1 to 5) kHz 2.3 % + 3.9 mA

(11 to 16.5) Amp Turns (45 to 65) Hz 0.23 % + 0.0023 A Fluke 5522A and
(65 to 440) Hz 0.62 % + 0.0023 A Fluke 50 turn coil

(16.5 to 150) Amp Turns (45 to 65) Hz 0.23 % + 0.019 A

(65 to 440) Hz 0.62 % + 0.021 A

(150 to 1000) Amp Turns (45 to 65) Hz 0.24 % + 0.070 A

(65 to 440) Hz 0.62 % + 0.078 A

(A2LA Cert. No. 1097.01) Revised 6/4/2021 Page 11 of 20

 Parameter/Range Frequency CMC2, 5, 6, 8 () Comments

AC Current – Measure3
(5 to 100) A (10 to 20) Hz 0.46 % + 35 nA HP 3458A
(20 to 45) Hz 0.17 % + 35 nA
45 Hz to 1 kHz 0.069 % + 35 nA
100 A to 1 mA (10 to 20) Hz 0.46 % + 0.23 µA
(20 to 45) Hz 0.17 % + 0.23 µA
(45 to 100) Hz 0.069 % + 0.23 µA
100 Hz to 5 kHz 0.035 % + 0.23 µA
(1 to 10) mA (10 to 20) Hz 0.46 % + 2.3 µA
(20 to 45) Hz 0.17 % + 2.3 µA
(45 to 100) Hz 0.069 % + 2.3 µA
100 Hz to 5 kHz 0.035 % + 2.3 µA
(10 to 100) mA (10 to 20) Hz 0.46 % + 23 µA
(20 to 45) Hz 0.17 % + 23 µA
(45 to 100) Hz 0.069 % + 23 µA
100 Hz to 5 kHz 0.035 % + 23 µA
100 mA to 1 A (10 to 20) Hz 0.46 % + 0.23 mA
(20 to 45) Hz 0.18 % + 0.23 mA
(45 to 100) Hz 0.092 % + 0.23 mA
100 Hz to 5 kHz 0.12 % + 0.23 mA

Phase Angle3 –
(0 to 360)° (10 to 65) Hz 0.082° Fluke 5520A
(65 to 500) Hz 0.19°
500 Hz to 1 kHz 0.39°
(1 to 5) kHz 1.9°
(5 to 10) kHz 3.9°
(10 to 30) kHz 7.8°

(A2LA Cert. No. 1097.01) Revised 6/4/2021 Page 12 of 20

 Parameter/Equipment Range CMC2, 8, 12 () Comments

AC Energy – Generate @
(47 to 63) Hz
(63 to 630) VAC 200 mA to 200 A 0.010 % Radian RD-22-331
(0 to 360)° Phase Watthour Standard and
Angle Radian RS-933
Watthour calibration
system

AC Energy – Measure @
(47 to 63) Hz
(63 to 630) VAC 200 mA to 200 A 0.0078 % Radian RD-22-331
(0 to 360)° Phase Watthour standard
Angle

Thermocouple Indicators3 –
Type E (-270 to -180) C 0.32 C Fluke 5720A with ice
(-180 to 1000) C 0.075 C bath
Type J (-210 to 1200) C 0.067 C
Type K (-200 to 1372) C 0.069 C
Type T (-250 to -180) C 0.11 C
(-180 to 400) C 0.070 C

III. Fluid Quantities

Parameter/Equipment Range CMC2, 8 () Comments

Gas Flow – Air Flow (5 to 20) sccm 0.048 sccm DHI molbocs
Meters (20 to 200) sccm 0.25 %
(0.2 to 2) L/min 0.24 %
(2 to 20) L/min 0.28 %

(0.5 to 65) ft3/min 0.38 % Sonic venturis

(7.5 to 50) L/min 0.22 %

Specific Gravity – (0.60 to 1.60) specific 0.000 25 specific By mass measurement

Hydrometers and Density gravity gravity
Meters

(A2LA Cert. No. 1097.01) Revised 6/4/2021 Page 13 of 20

IV. Mechanical

Parameter/Equipment Range CMC2, 8, 11 () Comments

Mass 1 mg to 5g 0.036 mg Single substitution

(5 to 10) g 0.069 mg
(10 to 100) g 0.20 mg
(100 to 200) g 0.45 mg
200 g to 2 kg 8.2 mg
(2 to 5) kg 17 mg
(5 to 10) kg 36 mg
(10 to 30) kg 120 mg

Force – Measuring (0 to 500) lbf 0.018 % Deadweights

Equipment
(Compression and
Tension)

Force – Measuring (500 to 2000) lbf 0.054 % Load cells

Equipment and (2000 to 5000) lbf 0.063 %
Measure (Compression (5000 to 25 000) lbf 0.061 %
and Tension) (25 000 to 50 000) lbf 0.056 %
(50 000 to 100 000) lbf 0.061 %

Vibration – Measuring (0.5 to 1) Hz 2.2 % Direct comparison

Equipment and (1 to 10) Hz 1.1 % long stroke and air
Accelerometers (10 to 100) Hz 0.67 % bearing shakers
100 Hz 0.50 %
100 Hz to 1 kHz 0.68 %
(1 to 5) kHz 1.0 %
(5 to 10) kHz 2.0 %
(10 to 15) kHz 3.0 %

(A2LA Cert. No. 1097.01) Revised 6/4/2021 Page 14 of 20

 Parameter/Equipment Range CMC2, 8 () Comments

Torque Wrench9 (2.5 to 20) inꞏlbf 1.0 % + 0.0062 inꞏlbf Torque transducers

(20 to 100) inꞏlbf 1.0 % + 0.010 inꞏlbf

(8.33 to 100) ftꞏlbf 1.0 % + 0.023 ftꞏlbf

(100 to 1000) ftꞏlbf 1.0 % + 0.23 ftꞏlbf

(1000 to 4000) ftꞏlbf 1.0 % + 2.1 ftꞏlbf

(4000 to 6500) ftꞏlbf 1.0 % + 2.4 ftꞏlbf

Torque Cells (2.5 to 20) in∙lbf 0.052 % + 0.000 82 in∙lbf Moment arm/weights
(10 to 100) in∙lbf 0.042 % + 0.000 55 in∙lbf
(10 to 100) ft∙lbf 0.040 % + 0.0033 ft∙lbf
(80 to 1000) ft∙lbf 0.10 % + 0.0030 ft∙lbf
(1000 to 6500) ft∙lbf 0.060 % + 0.25 ft∙lbf

Pressure – Gauge, 350 kPa to 16.5 MPa 0.0042 % + 66 Pa Hydraulic piston gage
Hydraulic (50 to 2400) psi 0.0042 % + 0.0095 psi

(6.9 to 83) MPa 0.0042 % + 68 Pa

(1000 to 12 000) psi 0.0042 % + 0.0098 psi

Pressure – Gauge, (4 to 350) KPa 0.0012 % + 0.58 Pa Fluke PG7601

Pneumatic (0.6 to 50) psi 0.0012 % + 0.000 085 psi pneumatic piston
gage
(20 to 3500) KPa 0.0018 % + 1.1 Pa
(3 to 500) psi 0.0018 % + 0.000 16 psi

(40 to 7000) KPa 0.0019 % + 13 Pa

(5.8 to 1000) psi 0.0019 % + 0.0019 psi

(A2LA Cert. No. 1097.01) Revised 6/4/2021 Page 15 of 20

 Parameter/Equipment Range CMC2, 8, 11 () Comments

Pressure – Absolute

Hydraulic 450 kPa to 17 MPa 0.0042 % + 70 Pa Hydraulic piston gage

(65 to 2415) psi 0.0042 % + 0.010 psi

(7 to 83) MPa 0.0042 % + 76 Pa

(1015 to 12 015) psi 0.0042 % + 0.011 psi

Pneumatic (7 to 350) KPa 0.0012 % + 0.71 Pa Fluke PG7601

(1 to 50) psi 0.0012 % + 0.000 10 psi pneumatic piston
gage
(50 to 3500) KPa 0.0018 % + 1.2 Pa
(7.3 to 500) psi 0.0018 % + 0.000 17 psi

(100 to 7000) KPa 0.0019 % + 13 Pa

(14.5 to 1000) psi 0.0019 % + 0.0019 psi

Differential/Gauge (-15 to -9) kPa 0.012 % + 0.000 16 kPa DHI PPC3 controller
(Pneumatic) (-9 to 9) kPa 0.0011 kPa with BG15ks sensor
(9 to 15) kPa 0.012 % + 0.000 16 kPa

Negative Gauge (0 to -9.3) kPa 0.022 kPa DHI PPC3 controller

Pressure (-9.3 to -100) kPa 0.010 % + 0.0019 kPa with A200 kp sensor

(0 to -1.35) psi 0.000 38 psi

(-1.35 to -15) psi 0.010 % + 0.000 28 psi

Tachometers3 –
Revolutions Per Minute

Contact9 (2 to 4000) fpm (0.55 + 0.000 09X) fpm Adapter plate Agilent
(1 to 2000) rpm 0.058 rpm 33622A signal
generator; X is the
measured value in
fpm; fpm=feet per
minute

Photo/LED9 (1 to 100 000) rpm 0.000 43 % Agilent 33622A and

LED

(A2LA Cert. No. 1097.01) Revised 6/4/2021 Page 16 of 20

V. Optical Quantities

Parameter/Equipment Range CMC2, 8 () Comments

Illuminance –

Light Meters (5 to 50) fc 0.70 % NIST standard

lamps at 2856K; X is
(50 to 100) fc (0.008X - 0.10) fc the nominal
illuminance level in
(100 to 500) fc (0.000 012X 2 + 0.0063X + foot candles (fc)
0.11) fc

(500 to 900) fc (0.000 007 5X 2 + 0.011X –

0.93) fc

Ultraviolet Light (200 to 8000) 6.0 % + 1.2 µW/cm2 365 nm detector

Meters @ 365 nm µW/cm2 system

Optical Transmission
Density –

Densitometer (0.1 to 1) d 0.0046 d SRM; d =

(1 to 4) d 0.015 d transmission density

Film (0.1 to 1) d 0.0046 d Densitometer

(1 to 4) d 0.015 d

VI. Thermodynamics

Parameter/Equipment Range7 CMC2, 11 () Comments

Temperature – Measuring
Equipment

SPRT

Hg -38.8344 C 0.0015 °C Freezing/melting

point standards and
Triple Point of Water 0.01 C 0.0012 C SPRT

Ga 29.7646 C 0.0016 °C
Sn 231.928 C 0.0022 C

Zn 419.527 C 0.0040 °C

(A2LA Cert. No. 1097.01) Revised 6/4/2021 Page 17 of 20

 Parameter/Equipment Range7 CMC2, 8, 11 () Comments

Temperature –
Measuring Equipment
(cont)

Liquid Nitrogen (-194 to -197) C 0.0027 °C SPRT, indicator, liquid

nitrogen bath

0 °C 0.010 C Ice bath

Temperature – Measure3 (-195 to -50) C 0.0081 C PRT and indicator

(-50 to 0) C 0.0056 C
(0 to 100) C 0.0067 C
(100 to 200) C 0.0072 C
(200 to 420) C 0.0080 C
(420 to 660) C 0.010 C

Temperature – (-15 to 0) C 0.65 C Fluke 4180 IR calibrator

Measuring Equipment, (0 to 100) C 0.78 C
IR Thermometers (100 to 120) C 0.83 C

(120 to 200) C 1.0 C Fluke 4181 IR calibrator

(200 to 350) C 1.8 C
(350 to 500) C 2.3 C

Relative Humidity3 –
Measuring Equipment (10 to 90) % RH 0.30 % + 0.24 % RH Thunder Scientific 2500

Dew Point3 – Measure (-50 to 20) C 0.23 °C Chilled mirror

Dew Point – Measuring (-15 to 30) C 0.15 °C Thunder Scientific 2500

Equipment

(A2LA Cert. No. 1097.01) Revised 6/4/2021 Page 18 of 20

VII. Time & Frequency

Parameter/Range Frequency7 CMC2, 11 () Comments

Spectracom SecureSync
Frequency – Generate 10 MHz 2.7 parts in 1010
with GPS to NIST

Frequency – Measuring 1 mHz to 990 MHz 2.7 parts in 1010 HP 33250A and 8656A
Equipment9 signal generators with 10
MHz distributed signal

Frequency – Measure9 1 mHz to 1.3 GHz 2.7 parts in 1010 Agilent 53230A
frequency counter with
10 MHz distributed signal
reference

________________________________
1
This laboratory offers commercial calibration service and field calibration service, where noted.
2
Calibration and Measurement Capability Uncertainty (CMC) is the smallest uncertainty of measurement
that a laboratory can achieve within its scope of accreditation when performing more or less routine
calibrations of nearly ideal measurement standards or nearly ideal measuring equipment. CMCs
represent expanded uncertainties expressed at approximately the 95 % level of confidence, usually
using a coverage factor of k = 2. The actual measurement uncertainty of a specific calibration
performed by the laboratory may be greater than the CMC due to the behavior of the customer’s device
and to influences from the circumstances of the specific calibration.
3
Field calibration service is available for this calibration. Please note the actual measurement
uncertainties achievable on a customer's site can normally be expected to be larger than the CMC found
on the A2LA Scope. Allowance must be made for aspects such as the environment at the place of
calibration and for other possible adverse effects such as those caused by transportation of the
calibration equipment. The usual allowance for the actual uncertainty introduced by the item being
calibrated, (e.g. resolution) must also be considered and this, on its own, could result in the actual
measurement uncertainty achievable on a customer’s site being larger than the CMC.
4
In the statement of CMC, L is the length of the unit under test in inches; R is the numerical value of the
resolution of the device in its respective units.
5
The measurands stated are generated with the Fluke 5520A, 5720A, 5725A series of instruments. This
capability is suitable for the calibration of the devices intended to measure the stated measurand in the
ranges indicated. CMC is expressed as either a specific value that covers the full range or as a
fraction/percentage of the reading/output plus a fixed floor specification.
6
The measurands stated are measured with the HP 3458A. This capability is suitable for the calibration
of the devices intended to generate the measurand in the ranges indicated. CMC is expressed as either a
specific value that covers the full range or as a combination of the fraction/percentage of the
reading/output plus a range specification.
7
Where ranges are not specified, the CMC stated is for the cardinal points only.
8
In the statement of CMC, percentages are to be read as percent of reading, unless otherwise indicated.

(A2LA Cert. No. 1097.01) Revised 6/4/2021 Page 19 of 20

9
Uncertainty contribution due to the UUT is not included.
10
This scope meets A2LA’s P112 Flexible Scope Policy.
11
The type of instrument or material being calibrated is defined by the parameter. This indicates the
laboratory is capable of calibrating instruments that measure or generate the values in the ranges
indicated for the listed measurement parameter.
12
The stated measured values are determined using the indicated instrument (see Comments). This
capability is suitable for the calibration of the devices intended to measure or generate the measured
value in the ranges indicated. CMCs are expressed as either a specific value that covers the full range or
as a percent or fraction of the reading plus a fixed floor specification.

(A2LA Cert. No. 1097.01) Revised 6/4/2021 Page 20 of 20

 Accredited Laboratory
A2LA has accredited

CONSUMERS ENERGY/LABORATORY SERVICES

Jackson, MI
for technical competence in the field of

Calibration
This laboratory is accredited in accordance with the recognized International Standard ISO/IEC 17025:2017 General
requirements for the competence of testing and calibration laboratories. This laboratory also meets the requirements of ANSI/NCSL
Z540-1-1994 and R205 – Specific Requirements: Calibration Laboratory Accreditation Program. This accreditation demonstrates
technical competence for a defined scope and the operation of a laboratory quality management system
(refer to joint ISO-ILAC-IAF Communiqué dated April 2017).

Presented this 22nd day of September 2020.

_______________________
Vice President, Accreditation Services
For the Accreditation Council
Certificate Number 1097.01
Valid to July 31, 2022
Revised on January 22, 2021

For the calibrations to which this accreditation applies, please refer to the laboratory’s Calibration Scope of Accreditation.