• DeltaOHM HD2156 pHmeter-Conductivity-Thermometer ( data logger )
  • DeltaOHM HD2156 pHmeter-Conductivity-Thermometer ( data logger )

DeltaOHM HD2156 pHmeter-Conductivity-Thermometer ( data logger )

Model : DeltaOHM HD2156

HD2156.1 – pHmeter-Conductivity-Thermometer

pHmeter-Conductivity-Thermometer measures pH, mV, conductivity, liquid resistivity, total dissolved solids, salinity and temperature.

pHmeter-Conductivity-Thermometer measures pH, mV, conductivity, liquid resistivity, total dissolved solids, salinity and temperature. Storage of maximum, minimum, average value, RS232 C output for data transfer in real time to a PC or printer. Functions: REL, HOLD and auto power off which can be disabled, IP 67 protection degree.

HD2156.2 – pHmeter-Conductivity-Thermometer data logger

pHmeter-Conductivity-Thermometer measures pH, mV, conductivity, liquid resistivity, total dissolved solids, salinity and temperature. Datalogger, stores the maximum, minimum, average value and can store up to 20,000 sets of three measurements.

pHmeter-Conductivity-Thermometer measures pH, mV, conductivity, liquid resistivity, total dissolved solids, salinity and temperature. Datalogger, stores the maximum, minimum, average value and can store up to 20,000 sets of three measurements. USB output for data transfer in real time to a PC or printer.

Functions: REL, HOLD and auto power off which can be disabled, IP 67 protection degree.


INSTRUMENT TECHNICAL CHARACTERISTICS
Measured quantities: pH, mV, χ, Ω, TDS, NaCl, °C, °F
Instrument
Dimensions
(Length x Width x Height) 185x90x40mm
Weight
470g (complete with batteries)

Materials
ABS, rubber

Display
2x4½ digits plus symbols

Visible area: 52x42mm

Operating conditions
Working temperature
-5…50°C

Storage temperature
-25…65°C

Working relative humidity
0…90%RH without condensation

Protection degree
IP66

Power
Batteries
4 1.5V type AA batteries

Autonomy
200 hours with 1800mAh alkaline batteries

Power absorbed with instrument off
20μA

Mains-supply unit
Output mains adapter 12Vdc/1000mA

Security of memorized data
Unlimited, independent of battery charge 
conditions

Time

Date and time
Real time schedule

Accuracy
1min/month max error

Measured values storage - model HD2156.2
Type
2000 pages containing 10 samples each

Quantity
20,000 sets of three measurements composed of 
pH or mV, χ, Ω or TDS or salinity and temperature.
Storage interval
1s, 5s, 10s, 15s, 30s, 1min, 2min, 5min, 10min, 
15min, 20min, 30min and 1h.

Serial interface RS232C
Type
RS232C electrically isolated

Baud rate
Can be set from 1200 to 38400 bauds

Data bit
8

Parity
None

Stop bit
1

Flow Control
Xon/Xoff

Serial cable length
Max 15m

Print interval
Immediate or selectable between: 1s, 5s, 10s,

15s, 30s, 1min, 2min, 5min, 10min,
15min, 20min, 30min and 1h.

USB interface - model HD2156.2
Type
1.1 - 2.0 electrically isolated

Connections
pH/mV input
Female BNC connector

Conductivity and Temperature input
8-pole male DIN45326 connector

Serial RS232C interface
8-pole MiniDin connector

USB interface
MiniUSB B-type connector

Mains adapter
2-pole connector (positive at centre)

Measurement of pH by Instrument
Measurement range
-2.00…+19.99pH

Resolution
0.01pH

Accuracy
± 0.01pH ±1 digit

Input impedance
> 1012Ω

Calibration error @25°C
|Offset|>20mV

Slope < 50mV/pH or Slope > 63mV/pH
Sensitivity < 85% or Sensitivity > 106.5%
Temperature compensation
-50…+150°C

automatic/manual

Measurement of mV by Instrument
Measurement range
-1999.9…+1999.9mV

Resolution
0.1mV

Accuracy
±0.6mV or ±1‰ of reading (the greater)

Drift after 1 year
0.5mV/year