PRS-812 Resistance Meter
3
#3 AUTO-MANUAL:
(Same as AUTOMATIC)
RESISTANCE RANGES IN AUTO-MANUAL 0.1
TO < 2.0E+12
as follows
@
<10V
: 0.1 TO < 1.0E+04
(0.1
- < 10K
)
@
10V:
1.0E+04 TO < 1.0E+06
(10K
- < 1M
)
@
100V:
1.0E+06 TO < 2.0E+12
(1M
- < 2T
)
See Note Below
NOTE:
It is capable of measuring up to 2.0x10
14
ohms with tolerance depending on procedures
and conditions.
2.
The PRS-812 provides three separate test voltages for resistance measurements as
indicated in the table, above:
<10
Volts
10 Volts
(Constant Test Voltage)
100 Volts
(Constant Test Voltage)
In AUTOMATIC and AUTOMATIC/MANUAL modes, test voltages are selected by the
instrument based on resistance characteristics of materials being measured. In the
MANUAL mode the operator may select test voltage.
3.
The PRS-812 displays resistance Measurements in several ways:
a.
14 individual operator programmable LED’s each representing one order of magnitude
from <10
3
to >10
12
ohms. The LED’s are preprogrammed for their respective colors
during final assembly of the instrument. Should a different color combination be desired
by the user, the program may be modified by PROSTAT during routine annual
calibration, or upon request. A modest service charge is required for this service. LED
colors include, GREEN, RED, YELLOW, and OFF (Blank)
b.
The large Liquid Crystal Display (LCD) includes an analog (1 - 10) scale and X1, X10
and X100 multiplier indication for measurement in
, K
, M
, G
and T
.
c.
Digital measurements are provided using integers and
, K
, M
, G
, T
indicators, or
in exponential format (1.0EXX) with
-T
indicators.
4.
The PRS-812 includes data logging (storage) capabilities for up to 80 data points when
RECORD is selected. The instrument will provide calculation and display of Minimum,
Maximum and Average of all measurements in the instrument’s memory at any time
RECALL is selected.
II. Cautions & Warnings
A.
As with any electrical device, use proper safety precautions and safe measurement procedures
to avoid personnel shock and arc discharge.
B.
The PRS-812 Resistance Meter is battery operated and delivers test voltages up to 100 volts.
NOTE:
The PRS-812 provides very accurate measurements up to 1.0x10
12
ohms,
and has the capability to display values up to 2.0x10
14
ohms. However, the user
should be aware that accuracy degrades rapidly above 1.0x10
12
ohms.