Prostat PRS-801, Руководство пользователя

Страница: 19 / 40

19
Rev. C / January 2012
PRS-812 Resistance Meter
c.
CAL
is displayed in LCD
d. Press
RESET
to calibrate instrument to shunt reference
e. Press
TEST
to measure shunt resistance of 1.02 ±0.02 ohms (Ω)
f. Press
RESET
button to prepare instrument for the next measurement
g. Repeat calibration procedure if necessary
h. Remove Calibration Shunt
5. Carefully connect test leads to positive (+) [Power] and negative (-) [Sensing] terminals. Insert
right angle sleeved banana into instrument terminal, press gently while twisting into position.
Standard 10-foot test leads are used for general audit measurements, and provides excellent
accuracy up to 1.0x10
12
ohms
6. Connect test leads to electrodes, fixture or circuit to be measured
7. Press Green
TEST
button to initiate Automatic measurement Test Cycle
a. The resistance range is reset to minimum (0.1Ω). It is automatically adjusted in conjunction
with the resistance characteristics of the materials under test, based on:
(1) Test voltage; and,
(2) Current flow.
b. Test Voltage is reset to <10V and automatically increased in accordance with the following
material resistance characteristics:
(1) <10 Volts: 0.1 to less than 1.0x10
4
ohms (0.1Ω - <10KΩ)
(2) 10 Volts: 1.0x10
4
to less than 1.0x10
6
ohms (10KΩ - < 1MΩ)
(3) 100 Volts: 1.0x10
6
to 2.0x10
14
ohms (1MΩ - 200TΩ)
(4) When
OL
is displayed, it mean that the resistance is greater than 2.0x10
14
ohms
c. Electrification period, i.e., the time period during which test voltage is applied to the ma-
terial under test, is automatically adjusted to the PRS-812’s measurement characteristics
and industry standards (ANSI/ESD STM11.11). Typical electrification periods are:
(1) 2 to 3 Seconds: 0.1 to less than 1.0x10
4
ohms (0.1Ω - <10KΩ)
(2) 2 to 4 Seconds: 1.0x10
4
to less than 1.0x10
6
ohms (10KΩ- < 1MΩ)
(3) 7 to 8 Seconds: 1.0x10
6
to >1.0x10
12
ohms (1MΩ->1TΩ)
(4) 15+ Seconds: 1.0x10
12
to 2.0x10
14
ohms (1TΩ - 200TΩ)