HD2156.1K pH meter-Conductivity Thermometer complete with pH electrode KP30, combined conductivity/temperature probe SP06T, temperature probe TP87, buffer solution 4,01pH and 6,86pH, conductivity solution 12.880μS. 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.
HD2156.2K pH meter-Conductivity Thermometer complete with pH electrode KP30, combined conductivity/temperature probe SP06T, temperature probe TP87, buffer solution 4,01pH and 6,86pH, conductivity solution 12.880μS. Datalogger which stores the maximum, minimum, average value and can store up to 20.000 sets of three data. RS232 C/ 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.

The HD2156.1 and HD2156.2 are portable instruments
with a large LCD display. They measure pH, mV,
redox potential (ORP), conductivity, liquid resistivity,
total dissolved solids (TDS) and salinity using
combined 4-ring and 2-ring conductivity / temperature probes.

Temperature only is measured by Pt100 or Pt1000
immersion, penetration or contact probes.
The pH electrode calibration, as well as manual,
can be carried out on one, two or three points and the calibration sequence can be chosen from a list of 13
buffers. The probe calibration can be performed automatically in one or more of the 147μS, 1413μS, 12880μS or 111800μS/cm conductivity calibration solutions.

The HD2156.2 instrument is a datalogger. It memorizes up to 20,000 sets of three measurements composed of pH or mV, conductivity or resistivity or TDS or salinity and temperature: these data can be transferred from the instrument connected to a PC via the multi-standard RS232C serial port and USB 2.0. The storing interval, printing, and baud rate can be configured using the menu.
The HD2156.1 and HD2156.2 models are fitted with an RS232C serial port and can transfer the acquired measurements to a PC or to a portable printer in real time.
The Max, Min and Avg function calculates the maximum, minimum or average values.
Other functions include: the Auto-HOLD function and the automatic turning off which can also be disabled.

INSTRUMENT TECHNICAL CHARACTERISTICS
Instrument
Dimensions
(Length x Width x Height) 185x90x40mm
Weight 470g (complete with batteries)
Materials ABS, rubber
Display 2x41⁄2 digits plus symbols
Visible area: 52x42mm
Operating conditions
Working temperature -5…50°C
Storing temperature -25…65°C
Working relative humidity 0…90%RH without condensation
Protection degree IP67
Power
Batteries 4 1.5V type AA batteries
Autonomy 200 hours with 1800mAh alkaline batteries
Power absorbed with instrument off 20μA
Mains Output mains adapter 9Vdc / 250mA
Security of memorized data Unlimited, independent of battery charge
conditions
Time
Date and time Schedule in real time
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 or Ω or TDS or salinity
and temperature.
Storage interval 1s…3600s (1hour)
Measurement of pH by Instrument
Measurement range -2.000…+19.999pH
Resolution 0.01 or 0.001pH selectable from menu
Accuracy ±0.001pH ±1digit
Input impedance >1012Ω
Calibration error @25°C |Offset| > 20mV
Slope > 63mV/pH or Slope < 50mV/pH
Sensitivity > 106.5% or Sensitivity < 85%
Measurement of mV by Instrument
Measurement range -1999.9…+1999.9mV
Resolution 0.1mV
Accuracy ±0.1mV ±1digit
Drift after 1 year 0.5mV/year
Measurement of conductivity by Instrument
Resolution with K cell=0.1 0.01μS/cm in range 0.00…19.99μS/cm
Measurement range
(K cell=1) / Resolution 0.0…199.9μS/cm / 0.1μS/cm
200…1999μS/cm / 1μS/cm
2.00…19.99mS/cm / 0.01mS/cm
20.0…199.9mS/cm / 0.1mS/cm
Accuracy (conductivity) ±0.5% ±1digit

ORDER CODES
HD2156.1K: The kit is composed of: instrument HD2156.1, KP30 electrode, SP06T conductivity/temperature combined probe, TP87 temperature probe, 4.01pH and 6.86pH buffer
solutions, conductivity solution 12.880μS/cm HD8712, connection cable for serial output
HD2110CSNM, 4 1.5V alkaline batteries, operating manual, case and DeltaLog9 software.
Other pH electrodes, conductivity and temperature probes must be ordered separately.
HD2156.2K: The kit is composed of: instrument HD2156.2 datalogger, KP30 electrode,
SP06T conductivity/temperature combined probe, TP87temperature probe, 4.01pH and 6.86pH buffer solutions, conductivity solution 12.880μS/cm HD8712, connection cable for serial output HD2101/USB,
4 1.5V alkaline batteries, operating manual, case and DeltaLog9 software.
Other pH electrodes, conductivity and temperature probes must be ordered separately.
HD2110CSNM: 8-pole connection cable MiniDin - Sub D 9-pole female for RS232C.
HD2101/USB: Connection cable USB 2.0 connector type A - 8-pole MiniDin (not suitable for HD2156.1K)
DeltaLog9: Software for download and management of the data on PC using Windows 98 to XP operating systems.
AF209.60: Stabilized power supply at 230Vac/9Vdc-300mA mains voltage.
S’print-BT: On request, portable, serial input, 24 column thermal printer, 58mm paper width.
pH Electrodes
KP20: Combined pH electrode, gel-filled, with screw connector S7, body in Epoxy, Ag/AgCl sat. KCl.
KP30: Combined pH electrode, cable 1m, gel-filled, body in Epoxy, Ag/AgCl sat. KCl.
KP60: Combined pH electrode, 1 diaphragm, gel-filled, with screw connector S7,
body in glass, Ag/AgCl sat. KCl.
KP61: Combined pH electrode, 3 diaphragms for milk, cream, etc. gel-filled, with
screw connector S7, body in glass, Ag/AgCl sat. KCl.
KP62: Combined pH electrode, 1 diaphragm for pure water, paints, etc. gel-filled,
with screw connector S7, body in glass, Ag/AgCl sat. KCl.
KP70: Combined pH electrode, micro diam. 6 x L=70mm, gel-filled, with screw
connector S7, body in glass, Ag/AgCl sat. KCl.
KP80: Combined pointed pH electrode, gel-filled, with screw connector S7, body
in glass, Ag/AgCl sat. KCl.
CP: Extension cable 1.5m with BNC connectors on one side and S7 on the other
side for electrode with S7 connector.
CE: Screw connector S7 for pH electrode. BNC: Female BNC for electrode extension.
ORP Electrodes
KP90: REDOX PLATINUM electrode, with screw connector S7, gel-filled, body in glass.