RPI RPT820 User manual
The Water Quality Tester is a meter
designed to measure water quality. This
meter determines the total amount of
dissolved solids (TDS) present in the
water being used for sterilization (or for
any other water quality purpose). RPI
recommends this meter be used with
StatIM ® Cassette Autoclaves. SciCan
states the total dissolved solids (TDS)
allowable in the water reservoir to be a
maximum of 5 Parts Per illion (ppm) or
a conductivity of less than 10 micro
Siemens (µs/cm). RPI’s Water Quality
Tester displays its readings in “Parts Per
illion” (ppm) and will automatically
compensate for temperature variations.
TDS Meter with Automatic
Temperature Compensation
RPT820
WATER QUALITY TESTER
INSTALLATION INSTRUCTIONS
SPECIFICATIONS:
Range: 0 to 999 ppm (mg/L)
Resolution: 1 ppm
Accuracy (@20°C/68°F): ±2%f.s.
Typical EMC Deviation: ±1%f.s.
Cali ration:
anual, 1 point, through trimmer
Cali ration Solution:
RPS821 (800 ppm @ 25°C)
Temperature Compensation:
Automatic, 5 to 50°C (41 to 122°F)
Environment:
0 to 50°C (32 to 122°F); 95%RH
Battery Type: 4 x 1.5V alkaline
Battery Life: approx. 150 hours
Dimensions: 150 x 30 x 21 mm
(5.90" x 1.20" x 0.80")
Weight: 70g (2.5.oz.)
BATTERIES:
Expected battery life should be approxi-
mately 150 hours. Batteries should be
replaced when the display will not turn
on or fades. The Tester uses (4) 1.5V coin
cells (Type LR44 or 357).
RECOMMENDATIONS FOR USERS:
Before using these products, make sure
that they are entirely suitable for the
environment in which they are used.
Operation of these instruments in resi-
dential areas could cause interference to
radio and TV equipment. Any variation
introduced by the user to the supplied
equipment may degrade the instru-
ment's E C performance. To avoid elec-
trical shock, do not use this instrument
when voltages at the measurement sur-
face exceed 24 Vac or 60 Vdc. To avoid
damage or burns, do not perform any
measurement in microwave ovens.
MAX
LEVEL
USE & MAINTENANCE INSTRUCTIONS
Liquid
Crystal
Display
ON/OFF
Switch
Minimum
Immersion
Level
Sensing
Pro es
Pocket
Clip
Cali ration
Trimmer
Maximum
Immersion
Level
Battery
Compartment
FRONT BACK
INSTRUCTIONS:
1. Remove cap.
2. Turn eter on (slide switch on top of meter to the on position).
3. Rinse Sensing Probes in distilled water by submersing and stirring gently.
4. Immerse Tester in a water sample without exceeding the max level line and without
bottoming out the meter. Stir gently and wait for the reading to stabilize.
5. The reading should be ≤5 ppm.
CALIBRATION:
Check calibration of meter using Calibration Solution (RPI Part #RPS821). Check eter
approximately every 4 months. Check calibration by immersing the Tester in a container
of calibration solution (the solution is supplied in a single use pouch and can serve as
the container) without exceeding the max level line and without bottoming out the
meter. Stir gently and wait for the reading to stabilize.
The calibration solution we carry is certified traceable to NIST Standard Reference
aterial Potassium Chloride (7447-40-7) and will provide a reading on the Tester of
800 ppm when tested at room temperature (77°F). Consult temperature chart on
calibration solution pouch for ppm values vs. temperature condition. SDS sheet
available from RPI's website (www.rpiparts.com).
If reading is outside of the calibration solution’s rated ppm value, adjust calibration
trimmer by inserting screwdriver (supplied with tester) through the hole in the side of
tester and adjust potentiometer until the value matches the specified ppm value from
the chart on the pouch. RPT820INS Rev A 09/15
