Have set up to activate 8 LEDs using DT800 digital channels based on various alarm conditions. Each is connected to a discrete DSO channel with the opposite end attached to an external 5VDC.

The 5VDC return is connected to the digital ground. Individually the led's illuminate as they should when the state is changed from 1 to 0. However when I try to turn on two at the same time either one i

How fast should you be able to unload data off a DT800. I am using a LAN connection and it has taken an hour to unload 23 MB of replay file off a 256 MB CF card.

Hello Roger,

I need to use a DT 800 in a hot environment (70 degC) and under low pressure (nearly vacuum). The logger should stand the temperature but what is about the flash card and the low pressure?

The logger should be in this environment for nearly on month so that a temp. shield is not really helpful.

Best Regards,
Thomas

I use current loop (L) sensors with 100 ohm shunt, with 4-20 mA range. I have also set gain lock to 2V since the voltage over the resistor will be in the range 0,4 - 2V. Is it possible to get readings of over 100% if the signal reaches beyond 20mA?

If this is the case approx. how much "over-range" is allowed before the error indicator (99999) is returned?

I have a DT800 datataker. I am using shared terminal voltage inputs with channel pairing (1V(#), 1+V(#), 1#V(#), 1-V(#), 2V, 2+V, 2-V, etc), giving me 42 channel single ended voltage inputs. All of the returns (GND) are combined (2#, 4#, 6# etc). I have found that the AC terminal also needs to be connected to the returns for the conversion to be performed OK.

I have used shared terminal volt

Does DT or anyone else know of a way to input multiple serial devices into the serial channel of a DT800 ?

I have an XP2i pressure gauge which communicates through rs232, I have successfully communicated with one gauge, but i need a way to communicate with 2 or more XP2i gauges. If any one has any ideas let me know.

Thanks

After installing firmware rel 4.06, the unload command has changed the way it is working: we use commands with start and stop time to unload parts of the log files, like:

UB(09:40:00,2004/09/28)(END)
The result of this command is all entries for the current job, schedule B. This command worked ok in rel 4.02. The setting of p31 is 3 and p39 is 0.

I have also tried the [] version of the

I'm not an electrician or electrical engineer, so this may be a stupid question. I can not find the answer in the manual, so it may be worth asking it anyway:

How can I connect a sensor that counts pulses (flow meter) with an open collector output (5-15V depending on the power supply, 300 ohms resistor built in) to a digital counter input. As far as I understand the counter input wants a dry

Is it possible to log the data from the DT800 to a harddisk on a PC? The DT800 is connected to a network.

Thanks.

I am trying to use the IBAT internal channel to estimate the battery life. The manual says that current draw should be 150mA (typical) or 400mA(max). I get -464Ma with no inputs connected and logging VBAT and IBAT at 1 sec interval only.

The battery voltage also drops quickly. Any Ideas?

What is the best method for sending 30 program files to the DT800? What program makes this the quickest?

Right now I'm using DeLogger and sending the program files one by one, which takes quite a bit of time. I have 30 program files, so the the data files do not get too large when collecting at approximately once per second all day.

One program calls another, when the day changes. So ma

I'm trying to log all data coming in on the serial input. The data occurs asynchronously in the form of '/n' terminated printable strings. Is this possible and how do I go about it?

Cheers TW

Hi Roger,

I am trying to turn on a led with a digital output when a Counter Input reach to a specific value. It is very easy, but I am having problems. I have assigned the value of the counter input to a Channel Variable. The only way to change the digital output state is using an alarm?

Thanks, Regards.

Hi Roger,

I am trying to log data from an anemometer (Anemometer standard 7911, from DAVIS INSTRUMENTS), which has 4 wires: - Black -> Wind speed contact closure to ground

Green -> Wind direction pot wiper (360 deg = 20 kOhm)
Yellow -> Pot supply voltage
Red -> Ground
I have tested the anemometer and works properly. But when I connected to the DT800: * The resistance rang

When transmitting real time data over a radio modem, I see that the communications error check characters are visible in the two last ;-separated fields.

The first of these I guess is the number if characters in the actual data message (?) but how is the second one calculated? Should come in handy when I try to see if the data is corrupted or not. The receiving program is not DeLogger or De-

Hi,

We are acceding remotely to a DT800 via TCP/IP socket. After a command "U", if link are lost (link provider problems or software break) the datalogger do not disconnect properly. Then, I can not restore the connection to DT800 remotely, and I have to restarted the DT800 manually.

The same occurs acceding to the DT800 locally by a Intranet. After send the command "U", if I remove the

DT800 logger.

I want to communicate over the serial port with a Programmable Counter (ESTERS PMO2160), which reads pulses from a pair of proximity switches, sensing targets on a wheel (essentially a rotary encoder), and calculates a counter value for the number of revolutions, displays it and optionally transmits it on a RS-485 port.

All this works fine, and the values on the display/po

I am using a USR courier modem (v.everything) with my DT800 (firmware v4.02.0001). I connect to it using another USR courier modem (v.everything). Everything is OK if the connection speed of the modems matches the serial port speed of the DT800.

I have printed an example below. CONNECT 9600/ARQ/V34/LAPM dataTaker 800 Version 4.02 If I connect at a different rate to the serial port speed of t

The Product Selector indicated +/- 10V. The latest manual indicates +/- 13V. What is the maximum voltage that can be measured before external attenuation is required? P/S: I recalled that the previous manual mentioned even 20V.

I am trying to power an LVDT using a DT800 using at least 15VDC. Currently, I have no problem reading the LVDT which has a voltage output range of -5VDC to +5VDC. Currently, I am using a 24VDC power supply for excitation.

Can I have this powered from the DT800?