BASI Instruments BPHT50 User manual

Specifications
Input Impedance
Measurement Range
(pHmin...pHmax)
Temperature Compensation Range
Temperature Compensation Sensor
Output
Power Supply
Maximum Line Load
Measurement Error
Temperature Drift
Ambient Temperature / Humidity
EM Compatibility
Protection Class
> 1013 
0...14 pH, 2...12 pH,
-2000...+2000 mV
0...100 °C
Pt100, Pt1000, .....................
4...20 mA, 2-wire
8…30 VDC, 12…30 VDC
(U-7.5)/20 [k], (U-11.5)/20 [k]
< 0.05% from span
0.005% from span for 1 °C
0…60 °C / 10…85% RH
according to EN 61326
IP65 (except BNC connector)
Warranty and Support
………………………….
serial number
………………………….
manufacturing date
QC check mark …….……(passed)
(stamp)
BASI Instrument AB
Torget 2
SE-270 33 VOLLSJÖ, SWEDEN
tel: [phone]
fax: [phone]
e-mail: [e-mail]
QD-8.2.4-WC
Warranty
BASI Instrument AB warrants this product
to be free from defects in materials
and workmanship for 2 years. If your unit
is found to be defective within that time,
we will promptly repair or replace it.
This warranty does not cover accidental
damage, wear or tear, or consequential
or incidental loss. This warranty
does not cover any defects caused
by wrong transportation, storage, installation,
or operating (see 'Specifications').
Technical support
In the unlikely event that you encounter
a problem with your BASI device,
please call your local dealer or contact
directly our support team.
BASI Instrument AB, P.O.Box 53, SE-270 33 VOLLSJÖ, SWEDEN
tel: [phone], fax: [phone], e-mail: [e-mail]
BPHT50
OPERATION MANUAL
Please read this Operation Manual before mounting and operating!
Save the Manual for future references!
pH/ORP TRANSMITTER
v1-06.09

Overview
Important note:
BPHT50 is designed
to operate ONLY
with pH/ORP probes
with combined electrodes!
The BPHT50 transmitter converts
the high impedance voltage output of pH
or REDOX (ORP) probes into standard
current signal that can be safely sent
over longer distances. The transmitter
provides the necessary for the normal
pH/ORP probe's operation high input
impedance as well as temperature
compensation of pH measurement
by the means of a temperature sensor
connected to the second transmitter input.
Wiring
Connect the pH/ORP probe
to the BPHT50 transmitter
through its BNC connector.
Take the cover
of the electronic block off
and run a cable with carefully
considered outer diameter
through the cable gland.
Observing the polarity,
connect the wires as shown
on the left diagram.
Close the box.
Important notes:
To wire the pH/ORP probe,
use ONLY coaxial shielded pH cable
no longer than 1.5 m.
If no temperature compensation
is needed, connect
a suitable external resistor
(e.g. 109.73 Ω for simulating 25 °C)
to terminals 'A' and 'B'.
Keep the BNC connector area
DRY AND CLEAN in order to assure
high input impedance!!!
Mounting
Unscrew the two
diagonally placed screws
and take off the electronic block cover.
Attach the body to a wall by 2 screws
via the openings of the other diagonal.
Put the cover back
and tighten up the screws.
Operating
Check the loop power supply voltage
(see 'Specifications').
Turn the power on.
The transmitter must generate
a current output according
to the calculation:
,
where pH is within the measurement
range (see 'Specifications').
If necessary, adjust the ZERO
of the transmitter with the 'Z' trimmer
and/or its SPAN –with the 'S' trimmer.
Waste Disposal
Do not dispose of
electronic devices
together with
household waste
material!
If disposed of within European Union,
this product should be treated
and recycled in accordance with the laws
of your jurisdiction implementing
the WEEE Directive 2002/96
on the Waste Electrical and Electronic
Equipment.