Specifications

SmartReader Plus Data Loggers

instead of the logger supplying the voltage potential, the logger detects the voltage level of the

pulse. The pulse must have a low level voltage less than 0.5 volts DC and the high level

voltage must be from 4.5 to 24 volts DC.

The minimum pulse length and minimum interval between pulses must be 2 milliseconds for

the slow input and 10 microseconds for the fast input. For the SmartReader Plus 9 to register

a count, the input voltage must go from a low level to a high level and back again to a low

level.

1.12.3 Setup and Use

The following steps will guide you through the procedure of setting up and using your

SmartReader Plus 9 Pulse Logger.

1. Always make sure that the circuit you want to monitor is compatible to use with the logger

before connecting it. Refer to the Specifications section for details on the type of

switches and logic signals that will work. Key things to note are:

· If you are going to be monitoring the opening and closing of switches, there must not be

a power source connected to the contacts (the contacts must be "dry").

· If you wish to monitor a circuit that produces pulsed signals, then the low level must fall

between 0 and 0.5 volts DC and the high level must be between 4.5 volts and 24 volts

DC.

· The frequency of the pulses or contact closures that you want to monitor must not

exceed the maximum capability of the SmartReader Plus 9 which is 4095 over any

sampling period.

2. Set the mode of operation of your SmartReader Plus 9 in TrendReader.

Channel

Description

Equation

Pulse Input 1

Pulse Input 2

3. Connect your switches or signals to check the operation of the logger by viewing the

Realtime reading while generating pulses. If the value increments, then you are ready to

start logging in the field.

1.12.4 Specifications

Pulse Inputs

Range: 4095 pulses/sample period

Accuracy: ±1 pulse/sample period

Absolute Max. Voltage: +24/-22 volts DC

Input Impedance: >1.0M for Vin<5V;