PT-104 Platinum Resistance Data Logger

PT-104 PRT Data Logger

Flexible: measures temperatures with either PT100 or PT1000 sensors, as well as

resistance and voltage.

Adaptable: can measure and record temperatures ranging from –200 to +800 °C.

Stable: Instead of voltage references, which tend to drift with temperature, the PT-104

uses high-precision reference resistors for improved stability.

Expandable: Use up to 20 units simultaneously on one PC.

Accuracy and resolution

Although accurate temperature sensors are widely available, it has been difficult to

take advantage of them due to errors caused by the measuring device. The PT-104

however, is inherently accurate due to its innovative design. Rather than relying

on voltage references (which tend to be temperature sensitive) it uses ‘reference’

resistors which are extremely stable (low temperature coefficient and drift). The exact

value of each resistor is stored in an EEPROM to provide the ultimate in accuracy

(yearly recalibration is recommended). A high-performance 24-bit ADC is used to

achieve the 0.001 °C resolution.

Resistance

When measuring resistance, the PT-104 uses a four-wire circuit to give the greatest

possible accuracy. Two resistance ranges are available (0 to 375 Ω and 0 to 10 kΩ). The

unit is calibrated for 0 to 375 Ω so this range should be used for best accuracy.

Voltage

For voltage measurements, each input connector can be treated as a differential input

with ground, or two single-ended inputs. Both inputs must be zero volts or above,

though it does not matter which input has the higher voltage.

Two voltage ranges are available (0 to 115 mV and 0 to 2500 mV). For the most

accurate measurements use the 0 to 2500 mV range.

The ultimate in portability

With both USB and Ethernet interfaces the PT-104 can be used in a variety of

situations. If you need a portable solution that can be used at various locations and

is fast to set up and use, simply connect your laptop to the PT-104 by USB. Need to

monitor a situation over a period of hours or days, or from a remote location? Plug

your PT-104 into a spare port on your network and then access it remotely either from

your LAN or over the internet (using Power

over Ethernet (PoE) technology means that

you don’t even need a separate power supply).

Ethernet connectivity is only supported in

PicoLog under Windows operating systems.

A

Mini-DIN

sockets (4)

B

E

D

C

Rear panel connections and

indicators

A: Ethernet port

B: USB port

C: Ethernet Data indicator

D: Ethernet Link indicator

E: Power/Status indicator

Temperature

The PT-104 measures temperature using platinum resistance thermometers (PRTs).

Both common industry standards (PT100 and PT1000) are supported. The unit

is compatible with two, three and four-wire sensors (four-wire PT100 sensors are

recommended for best accuracy). A wide range of PT100 sensors are available for

use with your PT-104.

Front panel connections

4 x mini-DIN sockets for the connection

of compatible platinum resistance

thermometers or the optional screw

terminal adaptor.