PAO Accredited Laboratories (as of Dec. 2012) - DTI

127. MERALCO – Testing Office
Calibration & Repair Laboratory
Address : Sub Transmission Services Bldg.,
Elisco Road, San Joaquin, Pasig City
Telephone No. : (632) 632-8370
Fax No. : (632) 632-8844
E-mail : tqm.iso@meralco.com.ph
Authorized Representative : Ms. Fanny Villanueva
TQM Coordinator
Accreditation No. Field of Testing
LA-2003-054C Calibration
Validity: 17 December 2014
Products/
Class of Test
Measured
quantities/
instrument
Range to be
calibrated
209 of 391
Best measurement
capability
expressed as an
uncertainty ()*
Standard
Method/
Reference
Standard
5.35 Indicating and recording instruments (4 ½ digit Digital Multimeter)
.01 DC voltmeters Voltage, DC 100 mV 0.40 µV In-house
1 V 2.30 µV PM-DTIL-401
10 V 15.00 µV
100 V 0.21 mV
1000 V 2.06 mV
.02 AC Voltmeters Voltage, AC 1 mV, 60 Hz 0.29 µV In-house
10 mV, 60 Hz 1.56 µV PM-DTIL-401
100 mV, 60 Hz 11.71 µV
1 V, 60 Hz 24.00 µV
10 V, 60 Hz 0.25 mV
100 V, 60 Hz 3.61 mV
1000 V, 60 Hz 37.51 mV
.03 DC Ammeters Current, DC 100 µA 0.002 µA In-house
1 mA 0.01 µA PM-DTIL-401
10 mA 0.10 µA
100 mA 1.46 µA
1 A 0.36 µA
10 A 0.55 mA
.04 AC Ammeters Current, AC 100 µA, 60 Hz 0.013 µA In-house
1 mA, 60 Hz 0.08 µA PM-DTIL-401
10 mA, 60 Hz 0.75 µA
100 mA, 60 Hz 7.54 µA
1 A, 60 Hz 0.11 mA
10 A, 60 Hz 1.96 mA
.09 Ohmmeters Resistance 10 Ω 0.08 mΩ In-house
100 Ω 0.56 mΩ PM-DTIL-401
1 KΩ 0.003 Ω
10 KΩ 0.03 Ω
100 KΩ 0.55 Ω
1 MΩ 0.01 KΩ
10 MΩ 0.23 KΩ
100 MΩ 10.80 KΩ
* A reported uncertainty will be that for the instrument itself during calibration plus the appropriate measurement capability
of the laboratory. The uncertainties are based on an estimated confidence probability of approximate 95% unless
otherwise stated.