EMIT
- 3651 Walnut Avenue, Chino, CA 91710 • (909) 664-9980 • Website:
TB-6512
Page 5 of 5
© 2014 DESCO INDUSTRIES, INC.
Employee Owned
TESTING THE MAT CIRCUIT
1.
Connect the Calibration Unit’s GROUND test lead to a
ground point.
2. Insert a wrist cord into the monitor’s operator jack and
snap it to the parking station. This will enable the
audible alarm circuit needed for calbration verfication.
3. Connect the included banana plug / wire adapter to the
Calibration Unit’s MAT test lead. Insert the adapter’s
wire terminal into monitor’s MAT terminal.
Figure 9. Connecting the MAT test lead from the Monitor
Calibration Unit to the Multi-Mount Continuous Monitor
4. Rotate the Calibration Unit’s selector knob to the MAT
FAIL 10M position. The monitor’s red MAT GROUND
LED should illuminate, and the alarm should sound.
5. Rotate the selector knob counter-clockwise to the MAT
PASS 10M position. The monitor’s green MAT
GROUND LED should illuminate.
Calibration
Required Test Equipment: RLC Bridge
Settings:
For 50 Hz, Frequency = 1,000 Hz (20 x 50), 20th Harmonic
For 60 Hz, Frequency = 1,020 Hz (17 x 60), 17th Harmonic
Set function switch to read “equivalent parallel circuit”
Additional Required Test Equipment for
MAT Resistance
Measurement:
Megger:
Set V compliance = 50V or less
or
DMM:
50V power supply
Record Data for:
Low Pass Low Fail
High Pass High Fail
Serial #
Cp
Dis Cp
Dis Cp
Dis
Cp
Dis
Serial #
Mat Pass
Mat Fail
Megohms @ 50V
Compare with the following specs (tolerance = ± 10%):
Equiv. Parallel C
Dissipation Factor
Low Fail
138.9 pF
0.158
Low Pass 118.6 pF
0.367
Hi Pass
49.0 pF
0.445
Hi Fail
44.7 pF
0.192
Mat (tolerance = ± 4%):
Pass
Fail
V Measure ~ 50
10 Meg
8 Megohms
12 Megohms
100 Meg 80 Megohms
120 Megohms
500 Meg 400 Megohms 600 Megohms
Specifications
Weight:
6.8 oz
192 g
Dimensions:
4.5" x 2.5" x 1.2"
11.4 cm x 6.4 cm x 3.0 cm
Limited Warranty, Warranty Exclusions, Limit of
Liability and RMA Request Instructions
See EMIT’s Warranty -
